What does an MRI scan show?

I am scheduled for an MRI scan(on my knee) tomorrow. If it should come back normal does that be set to that my knee is fine? Will the MRI show ALL abnormalities in regard to the knee?
Answers:
Darn close by everything... just don't move or you are wasting your money. Sandbagging your leg will help immobilize it. One article that could be missed is a meniscal lift without a tear...

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MRI stands for magnetic resonance imaging.

Basically what it does is it shows shabby parts of the body.

The MRI sends out radio waves (this is why anyone in an MRI hears the bangs) which cause the protons to change position. This gives a picture of what the inside of your body looks like.

Damaged areas don't move as hurried and this shows up in the image the doctors will get. This help them to determine where the damaged area of your knees is.

Once the determine where your knee is damaged the doctors can later figure out what the problem most likely is.

MRI's are completely safe so you own nothing to worry about!
Good Luck!
The MRI will show any abnormalities of the knee. Here is some information on the MRI process.

The MRI mechanism is a large, cylindrical (tube-shaped) machine that creates a strong magnetic enclosed space around the patient. The magnetic field, along beside a radiofrequency, alters the hydrogen atoms' natural alignment in the body. Computers are then used to form a two-dimensional (2D) figure of a body structure or organ based on the activity of the hydrogen atoms. Cross-sectional views can be obtain to reveal further details. MRI does not use radiation, as do x-rays or computed tomography (CT scans).

A magnetic field is created and pulses of radio waves are sent from a scanner. The radio top knock the nuclei of the atoms in your body out of their normal position. As the nucleus realign back into proper position, they send out radio signals. These signals are received by a computer that analyzes and converts them into an image of the cut of the body being examined. This image appears on a viewing monitor. Some MRI machines look like get thinner tunnels, while others are more open.

Magnetic resonance imaging (MRI) may be used instead of computed tomography (CT) in situations where organs or soft tissue are mortal studied, because bones do not obscure the images of organs and soft tissues, as they do in CT.

Because radiation is unused, there is no risk of exposure to radiation during an MRI procedure.

Due to the use of the strong magnet, MRI cannot be performed on patients with implanted pacemaker, intracranial aneurysm clips, cochlear implants, certain prosthetic devices, implanted drug infusion pumps, neurostimulators, bone-growth stimulators, certain intrauterine contraceptive devices, or any other type of iron-based metal implant. MRI is also contraindicated in the presence of internal metallic objects such as bullets or shrapnel, as well as surgical clips, pins, plates, screws, metal sutures, or chain mesh.

Newer uses and indications for MRI have contributed to the development of additional enigmatic resonance technology. Magnetic resonance angiography (MRA) is a procedure used to evaluate blood flow through arteries in a noninvasive (the skin is not pierced) manner. MRA can also be used to detect aneurysms within the brain and vascular malformations (abnormalities of blood vessel within the brain, spinal cord, or other parts of the body).

Magnetic resonance spectroscopy (MRS) is another noninvasive procedure used to assess chemical abnormalities in body tissues such as the brain. MRS may be used to assess disorders such as HIV infection of the brain, stroke, chief injury, coma, Alzheimer's disease, tumors, and multiple sclerosis.

Functional magnetic resonance imaging of the brain (fMRI) is used to determine the specific location of the brain where a certain function, such as speech or memory, occur. The general areas of the brain in which such functions occur are prearranged, but the exact location may vary from person to person. During functional resonance imaging of the brain, you will be asked to make a specific task, such as recite the Pledge of Allegiance, while the scan is being done. By pinpointing the exact location of the functional center contained by the brain, physicians can plan surgery or other treatments for a particular disorder of the brain.

Another advance in MRI technology is the "open" MRI. Standard MRI unit have a closed cylinder-shaped tunnel into which the patient is placed for the procedure. Open MRI units do not completely surround the merciful, and some units may be open on all sides.

Using an MRI scanner, it is possible to variety pictures of almost all the tissue in the body. The tissue that has the lowest possible hydrogen atoms (such as bones) turns out dark, while the tissue that has many hydrogen atoms (such as fatty tissue) looks much brighter. By shifting the timing of the radiowave pulses it is possible to gain information about the different types of tissues that are present.

An MRI scan is also able to provide clear pictures of parts of the body that are surrounded by bone tissue, so the technique is useful when examining the brain and spinal cord.

Because the MRI scan give very detailed pictures it is the best technique when it comes to finding tumours (benign or malignant abnormal growths) in the brain. If a tumour is present the scan can also be used to find out if it have spread into nearby brain tissue.

The technique also allows us to focus on other details in the brain. For example, it makes it possible to see the strands of atypical tissue that occur if someone has multiple sclerosis and it is possible to see changes occurring when at hand is bleeding in the brain, or find out if the brain tissue has suffered lack of oxygen after a stroke.

The MRI scan is also competent to show both the heart and the large blood vessels in the surrounding tissue. This make it possible to detect heart defects that have been building up since birth, as ably as changes in the thi


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